Improvement in rotary pumps



UNITED STATES PATENT @Finca ANDREIV WALKER, 0F CLAREMONT, NEW HAMPSHIRE.

l IMPROVEMENT IN ROTARY PUMPS.

Specification forming part of Letters Patent No. d5,096, dated November l5, 1864.

To all whom it may concern:

Be it known that I, ANDREW WALKER, of Claremont, in the county of Sullivan, in the State of New Hampshire, have invented a new and useful Improvementin the Construction of Pumps and Fire-Engines; and Ihereby certify that the following is a true and exact I description thereof, reference being had to the accompanying drawings, in which- Figure I isa vertical section of the pumps, and Fig. II is a bottom view of the rotary piston thereof.

'lo venable others skilled in the art to make and use my invention, I will describe its construction and operation by the aid of the accompanying drawings and the letters of reference marked thereon.

A' is the pipe leading to the well, cistern, or fountain from which the water is to be drawn.

B is the cylinder of the pumps, which is divided into two apartments by the partitions a and b. The axis C is placed within the cylinder, and one end thereof works in a joint or box in the center of one extremity of the cylinder. The other end of the axis passes through the center of the other extremity of the cylinder a sufficient distance to allow the lever D to be attached to it. The axis works water-tight between the partitions ,a and b. To the axis C are attached the horizontal floats or pistons c and d, which are made to work water-tight within the cylinder by means of packing. In the floats or pistons c and d are the valves e and f, which work on hinges at g g. 0n each side of the partition b are the ball-valves E and F, placed on orices in the bottom of the cylinder, through which the water enters from the pipe A. The wires It li pass through the partition b and are adjusted so as to prevent the balls from becoming displaced, but allow them to raise off the orifices a sufficient distance to let the water pass through them. Through the top of the cylinder are two orifices, Gr and H, communicating with the air-chamber I. These orifices are opened and closed alternately by the ball-valve K.

In the lower part of the air-chamber I is placed the rotary piston L, Figs. I and II, in

which are apertures lt It, Fig. II, which admit of the pressure of the air on the water when it is forced into the air-chamber I. To the revolving piston L is attached the rod N, which passes through the top of the air-chamber I, and to the top of which is attached the lever M, by which the piston is made to revolve. The piston L extends below the dischargepipes O 0. In the side of the piston is a recess, P, which extends above the dischargepipes O O, which will allow the water to pass up and escape through the pipe to which the recessie turned. rlhe leverM serves as an index 'to point to the discharge-pipe it is desired to open, any one of which may be opened or closed instantaneously.

The operation of the pump is as follows: By means of the lever D the horizontal iioats or pistons cand d are raised and lowered alternately. When either of the pistons is raised, the ball-valve in the same apartment at the bottom of the cylinder opens, and the water follows the piston (or is drawn up by the suction thereof) and lls the vacuum. At the same time the valve e or j', as the case may be, is closed, and the water above the piston is forced up through the oriiice Gr or H, where it meets with the pressure of the air in the airchamber I and is forced out through either of the discharge-pipes O O, to which the recess P may be turned. When the water is forced through either of the orifices G or lEI, the ball K is forced onto the opposite one, which prevents the water from iiowing back on the piston in the cylinder that is depressed, and at the same time the ball on the same side at the bottom of the cylinder is closed, which prevents the water from flowing back through the pipe A, and the valvein the piston is opened and the water lforced through it to the space above the piston. When it is desired to let the water escape from the cylinder, it may be done by lowering either of the pistons o or d until the ball E or F is rolled from the oriee by one of the wires i i, and at the same time the valve e or j will be opened by the wirejj in the partition b. When one apartment of the cylinder is empty, the water may be allowed to escape. from the other in the same manner.

rIhe rotary piston L may be applied to hydrants as well as to pumps, and by which all the discharge-pipes may be closed at once, or any one that is desired may be opened in a moment, thus admitting of quick change in case of lire.a

I do not confine myself to the construction of pumps for drawing Water from wells, eisl tons o and Lilie ball-valvesE and F,theba1l tems, 85o., but may construct iireengiues, valve K, the orifices G and H, substantially Ste., onl the saune principle as my pump. upon the principle und in the manner herein What I claim as new in my invention7 and set forth. desire to secure byLetters Patent, is-

1. The rotary piston L, substantially as de ANDREW WALKER' scribed, and for the purpose set forth. Witnesses:

2. The combination and arrangement of the Gno. W. MERRIFIELD, rotary piston L, the horizontal oats or pis- HENRY JUDKINS. 

